Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30
The AirTAC SAIJ80X70-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel down to a 40-70 mm window. It delivers a robust 2513 N push force at 0.5 MPa, making it well-suited for moderate to heavy actuation tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting.
This unit is configured with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The rear adjuster acts as a mechanical stop to dial in the exact end position during commissioning without adding external stops. It operates at speeds of 30-800 mm/s and relies on variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30 Is Used
Machine Changeover
Dial in the 40-70 mm travel window during product size changes without swapping out the entire cylinder assembly.
End-Position Tuning
Fine-tune the retract stroke precisely at commissioning using the rear stopper screw to avoid adding external mechanical stops.
Corrosive Assembly Lines
Leverage the 2513 N force and SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30 the Right Cylinder?
Choose this 80 mm bore adjustable-stroke model when your machine setup requires precise end-position tuning over a 40-70 mm travel window, rather than relying on a fixed-stroke SAI cylinder. If your application demands less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa, whereas larger loads up to 3927 N would require the 100 mm bore option.
When selecting this cylinder, note that the rear adjuster and air cushions only serve to set and decelerate the travel end; they do not hold the load without live air pressure. For true fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder, or integrate an external pilot-operated check valve. This SAIJ model supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX70-30 FAQ
At a 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. It can reach a maximum push force of 4523 N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 70 mm nominal stroke by up to 30 mm, creating a usable 40-70 mm travel window. This allows for fine-tuning the end position during setup without needing a different cylinder.
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